Equilateral prisms are normally used as dispersing prisms. As well as standard BK7 prisms, higher index. SF2 and F2 prisms are offered to increase the dispersive power.
| LENS | DRAWING | APPLICATION | MATERIAL |
|---|---|---|---|
| Equilateral Prism |  | Equilateral prisms are normally used as dispersing prisms | BK7 |
| SPECIFICATION | GRADE |
|---|---|
| Material | BK7 |
| Dimension | +/-0.2 (General), +0/-0.05 (High Precision) |
| Surface Flatness | < lambda / 8 @ 633 nm |
| Surface Quality | <20 / 10 (for BK7A) <40 / 20 (for SF10 & F2) |
| Diameter Tolerance | < + 0.00 / u2013 0.20mm |
| Effective Focal Length | +2% |
- Other Diameter/thickness available on request.
